Multiple ion substitutions to Na_0.5Bi_0.5TiO₃ give rise to favourable dielectric properties over the technologically important temperature range −55 °C to 300 °C. A relative permittivity, ε_r, = 1300 ± 15% was recorded, with low loss tangent, tanδ ≤ 0.025, for temperatures from 310 °C to 0 °C, tanδ increasing to 0.05 at −55 °C (1 kHz) in the targeted solid solution (1–x)[0.85Na_0.5Bi_0.5TiO₃–0.15Ba_0.8Ca_0.2Ti_1-yZr_yO₃]–xNaNbO₃: x = 0.3, y = 0.2. The ε_r-T plots for NaNbO₃ contents x < 0.2 exhibited a frequency-dependent inflection below the temperature of a broad dielectric peak. Higher levels of niobate substitution resulted in a single peak with frequency dispersion, typical of a normal relaxor ferroelectric. Experimental trends in properties suggest that the dielectric inflection is the true relaxor dielectric peak and appears as an inflection due to overlap with an independent broad dielectric peak. Process-related cation and oxygen vacancies and their possible contributions to dielectric properties are discussed.

在技​​术上重要的-55°C至300°C的温度范围内，用多个离子取代Na _0.5 Bi _0.5 TiO ₃可获得良好的介电性能。在310°C至0°C的温度下，记录的相对介电常数_εr = 1300±15％，损耗角正切tanδ≤0.025，在-55°C（1 kHz）时，tanδ增加到0.05。目标固溶体（1-x）[0.85Na _0.5 Bi _0.5 TiO ₃ -0.15Ba _0.8 Ca _0.2 Ti _1-y Zr _y O ₃ ] -xNaNbO ₃：x = 0.3，y = 0.2。的ε _{- [R} -T地块为的NaNbO ₃含量x ＜0.2在宽介电峰的温度以下显示出随频率变化的拐点。较高的铌酸盐取代水平会导致单个峰出现频散，这是正常弛张铁电体的典型特征。性能的实验趋势表明，介电拐点是真正的弛豫介电峰，由于与一个独立的宽介电峰重叠而出现为拐点。讨论了与工艺有关的阳离子和氧空位及其对介电性能的可能贡献。